Revetment block



FIG. 1 is an upper and right perspective view of a revetment block of my new design;

FIG. 2 is a bottom plan view thereof;

FIG. 3 is a left side elevational view thereof;

FIG. 4 is a right elevational view thereof;

FIG. 5 is a front side elevational view thereof, the back side elevational plan view being a mirror image thereof; and,

FIG. 6 is a top plan view thereof in a mat formed with a plurality of said revetment blocks illustrated in broken line with mirrored adjacent revetment blocks joined together by chain links shown in broken line, to illustrate the environment thereof which forms no part of the claimed design. 

The ornamental design for a revetment block, as shown and described. 